Tube-expander



(No Model.)

P. H. BENADB. TUBE EXPANDBR.

No. 434,314. Patented Aug. 12, 1890.

4 I a v INVENTOR:

ATT OHWE Y 8.

1 UNITED STATES PATENT OFF-ICE.

PATRICK BENADE, OF PUNXSUTAWVNEY, PENNSYLVANIA.

TU BE-EXPANDER.

SPECIFICATION forming part of Letters Patent No. 434,314, dated August 12, 1890. Application filed October 8, 1889. Serial No. 326,318. (No model.)

' To whom it may concern.-

Be it known that I, PATRICK H. BENADE, a resident of Punxsutawney, in the county of Jefferson and State of Pennsylvania,have invented a new and useful Improvement in Tube-Expanders, of which the following is a full, clear, and exact description.

The objects of my invention are to provide a compact and convenient implement of the class named, which will when in use lock fast to one end of a tube or boiler-flue and retain the parts in position to expand the tube inside of the boiler against the flue-sheet when the device is rotated, and afterward to flange the end of the fine, so as to return its projecting end against the outer surface of the fluesheet.

With these ends in view my invention consists in certain features of construction and combinations of. parts, which will be hereinafter described, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification,

' in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a side view of the tool, part of the handle-bar which revolves the expander being broken ofi. Fig. 2 is a longitudinal section of the front portion of the device with a spring-dog in connection therewith, an edge View of the latter being shown. Fig. 3 is a cross-section of the tool, taken on the line 1 1 in Figs. 1 and 2. Fig. 4 is a transverse section of the device, taken on theline 2 2 in Fig. 2. Figs. 5 and 6 are enlarged side views of the end of the elongated barwhich connects the expander-shellwith the spring-dog that engages the opposite end of a flue. Fig. 7 is a transverse section of the part shown in Figs. 5 and 6, taken on the line 4 4 in said figures. Fig. 8 is an end view, enlarged, of the couplingbox which connects the expander-shell with a spring-clog, indicated at lines 3 3 in Figs. 1 and 10. Fig. 9 is a cross-section of the coupling-box, taken on the line 5 5 in Fig. 10. Fig.

10 is an enlarged side view of the coupling box. Fig. 11 is a view of the rear ends of the spring-dog and attached parts showing a special adjustment of the latter; and Fig. 12

is a'detached view of parts of the tool, showing its operation in expandiuga tube in contact with a flue-sheet.

A is the body or shell of the tube-expander. It is cylindrical and of suitable length to receive a comically-tapered pin L. At its front end A the shell A is reduced for the reception of a sleeve I, made to fit and slide thereon. The reduced portion A is extended to a shoulder 70, and near this point the shell A is perforated, three spaced apertures of suitable size and form being produced for the reception of the cylindrical rollers e, which are adapted to expand the flue when these are forced outwardly by the tapering or conical pin L and the shell is rotated. At the front extremity there is a threaded portion A formed on the shell A, and a plug G is inserted in the end of the same, the connection being made removable by threading the parts, as shown in Fig. 2, a handle-bar G being affixed upon the plug to rotate the shell A and the parts mounted on it.

The plug G is axially perforated and threaded to receive the screw-cutend of the bar J, which is a detachable shank for the conical pin L, the connection of said parts being a T-shaped head and slot, as at n in Fig. 2.

Upon the outer terminal of the shank, J a cross-handle H is secured removably by a squared reduction of the body provided to receive the similarly-perforated handle, a binding-nut h retaining the pieces together.

Integral with the front end of the sleeve I, a collar E is formed thereon, which is perforated radially at spaced intervals to be rotated by a pin wrench or lever, which can be inserted in these holes. On the opposite end of the sleeve I a hub 19 is formed, on which are three integral studsj, made integral with the hub and evenly spaced apart, for the reception and revoluble support of the grooved flanging rollers D, these being secured to revolve by the nuts 1'', (one being shown in Fig. 3,) which jam against shoulders on the studs 2', and having threaded engagement with the free outer ends of said studs.

Upon the forward threaded portion A of shell A a loose collar F is mounted, it being threaded and provided with radial perforations g. The collar F serves as a nut tobear against the fixed collar E, and a pin-lever inserted in the holes g may be made to turn the collar and force the sleeve I toward the shoulder K, for a purpose which will be explained.

The end of 'the shell A opposite to the reduced portion A is threaded for the reception of a cap-nut A, said nut being made to receive the cylindrical body of the connecting-rod A which is of such a length, proportioned to that'of the dues or tubes operated upon, that a spring-dog C will be supported to engage the end of the flue opposite to the end which is being set, as the operation of first expanding and then hanging a flue end is termed.

It is necessary for the proper operation of the implement that the rod A should have a swiveled engagement with the nut A. To this end aeollar 1' is formed on the end of the rod and has contact loosely with the nut when the parts are assembled.

The spring-dog O has two diverging limbs C, that terminate in wedge-shaped enlargements C said enlarged portions havingabrupt shoulders .9, produced at the junctions of the same with the limbs 0. Each limb of the spring-dog is slotted to receive thetriangular blocks a, that are pivoted at a therein, said blocks being so adjusted that angular points of the same will project slightly above the wedge-shaped ends C these corners being so retained by engagement of flat sides of the blocks with the plate-sprin gs a',which springs are secured longitudinally of the limbs C on their inner surfaces. (See Fig. 1.)

An interlocking coupling-box B is furnished to connect the spring-dog C with the rod A The box B consists of an elongated round block centrally perforated at o, of a size to receive the rod A, the end oof said rod seating in this hole as a socket. There are aligning smaller holes 0', (see Fig. 8,) form ed oppositely in the body of the box 13, which longitudinally cut into or intersect the axial perforation 0, thus aifording a proper-shaped aperture for the insertion of the wings d,formed .on the body of the rod A at opposite points.

The body of the coupling-box B is perforated at d, a nearly-rectangular orifice being produced transversely of the axial perforation of the box. The front walls of the orifice are sloped from (1" to (Z (see Fig. 10,) thus producing cam-faces, against which the adjacent ends of the wings d impinge when these are inserted inthe longitudinal holes 0 far enough to be opposite the transverse orifice d and enter the same when the rod A is partially revolved. As the end of the rod A is seated on the bottom of the axial hole in the box B, the revoluble movement of the rod will cause the cam-faces of the orifice (Z to press the end of the rod on the terminal of the socket-hole it seats in, as at c, by reason of their wedging action on the wings cl, so that the rod end and box will be removably secured together. At a the box B is reduced and prolonged as a cylindrical bolt end I), which is threaded to receive the tapped hub end of the spring-dog C, which can be longitudinally adjusted on said bolt by revolving it. A jam-nutb, when set tight against the end of the hub, secures the dog at any desired point thereon.

In use the rod A is provided of suflicient length, compared to that of the boiler tubes or flues, that an accurate adjustment for length of the device between the shoulders s and k may be efiected by revolving the springdog 0 on the bolt end I). The dog C is thrust into the flue from the end which is to be expanded and bead-flanged, or set, as it is termed. The compression of the limbs O toward each other a limited distance by the insertion of the wedge-shaped ends 0 will permit the projecting ends of the triangular blocks a to abut upon the flue end. This will rock the blocks a and cause them to slide against the inner surface of the flue when the device is inserted therein. The entire device is now moved longitudinally until the beading-rollers D impinge on the front end of the flue or end in which the dog was inserted. The equal divergence of the limbs O by reason of their set and elasticity affords means for the automatic centering of the bolt end 1) within the flue operated upon, so that the dog C is self-adjusting and maintains the rod A box B, and its bolt-end extension axially coincident within the tube, dispensing with washers and nuts that require removal and replacement when a change of the tool is made from one flue to. another. The adjustment of the sleeve I longitudinally by rotation of the collar F should be such that the rollers a will lie opposite the portion of the flue which is engaged by the sheet M, (see Fig. 12,) so that a rotation of the shellA by the handle-bar G will expand the flue and force it against the edge of the sheet as the pin L is forced against the rollers by rotation of the cross-handle H. On completion of the expansion of the flue the collar F is moved toward the handle-bar G by revolving it, and the entire device is thrust inward until the ends G are clear from the rear end of the flue N, when the triangular blocks a are given the position shown in Fig. 11, which will permit the shoulders S to engage the flue end and hold the too], in position to commence the beading of the flue end 6, which is effected by the jointaction of the rollers D and feeding collar or nut F, in an obvious manner. After the beading of a fine end has been accomplished the rollers are drawn away from the head by reverse movement of the collar F, which will allow the sleeve I to he slid forward. Then the tool is pushed through the flue rearwardly. The blocks a, being adjusted manually, will by action of the springs a be retained in the position shown in Fig. 1, which will permit the withdrawal of the spring-dog by compression of its limbs toward each other, the inclines on. theblocks a facilitating said operation.

TIO

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a tube-expander, the combination, with an expander-shell, and a sleeve having grooved rollers loosely mounted thereon and which slides on the forward portion of the shell, of a coupling-box having a threaded bolt-end extension, a connecting-rod adapted to lock fast to the coupling-box and swivel in the expander-shell, and a screw-threaded spring-dog having longitudinal adjustment on the threaded bolt-end extension of the coupling-box, substantially as set forth.

2. .In a tube-expander, the combination, with an expander device loosely secured to one end of a connecting-rod, and a connecting rod, of a coupling-box to which the other end of the connecting-rod isremovably attached, said box having a threaded bolt-end extension therefrom, and a screw-threaded dog having two equally-divergent spring-limbs provided with shoulders on wedge-shaped terminals, substantially as set forth.

3. In at-ube-cxpander,a dog having equallydivergent spring-limbs, which are furnished with wedge-shapedterminals and shoulders thereon to abut on a flue end, and revoluble blocks pivoted to the limbs near the shoulders, which blocks have inclined faces with the ends therefrom projecting outside of the shoulders on the spring-limbs to facilitate the removal of the spring-dog from an engaged flue end, substantially as set forth.

4. In a tube-expander, the combination, withanexpander-shellhavingexteriorthreads on its forward end,a loose sleeve thereon, and spaced grooved rollers loosely mounted on the inner end of the sleeve, of a screw-threaded collar which bears against the outer end of the sleeve, a conical pin within the shell, means to adjust this pin longitudinally, and a screw-threaded spring-dog having two norm all y-divergentlimbs, which engages the rear end of a threaded bolt that is swivel-connected to the expander-shell, substantially as set forth.

5. In a tube-expander, the combination, with an expander devicecomprised of a shell, spaced rollers in the shell, a taper pin, and means to adjust the pin endwise against the expander-rollers, of a connecting-rod revolubly secured to the rear end of the expandershell, a coupling-box in which the rod is revoluble spaced grooved rollers radially arranged on the shell to engage a fine end with their peripheries, and means to move the pin and revolve the shell, of a coupling-box perforated axially and apertured transversely, so as to have interlocked connection with the winged end of a connecting-rod,a connecting-rod loosely secured to the rear end of the expander-shell and provided with wings that enter the coupling box apertures, and a spring -dog having two equally divergent spring-limbs having shouldered and wedgeshaped enlargements on their ends, and triangular blocks pivoted to the spring-limbs near the shoulders, so as to project theirends above the shoulders when they are to be withdrawn from a fine, substantially as set forth.

7. In a tube expander or beader, the combination, with a cylindrical shell having a reduced threaded portion formed integrally therewith,a sleeve mounted on the forward portion of the cylindrical shell, three grooved rollers radially and revolubly supported at spaced intervals near one end of the sleeve, and an integral collar formed at the opposite end of the said sleeve, of a tapered or conical pin removably attached to an elongated shank, which is held concentric withthe shell, a shank, a handle-bar to revolve the shell, a cross-handle to propel the pin endwise, and three cylindrical expanding-rollers seated in spaced holes in the shell and in contact with the conical pin, substantially as set forth.

P. H. BENADE.

Witnesses:

W. H. MUNDORFE, W. M. KIRKPATRICK. 

